/*
 * Copyright (c) 2015 Spotify AB.
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package com.spotify.heroic.rpc.jvm;

import com.spotify.heroic.cluster.ClusterNode;

import java.util.Map;
import java.util.Optional;
import java.util.concurrent.ConcurrentHashMap;

/**
 * Defines an isolated context in the JVM where RPC nodes can see each others.
 */
public class JvmRpcContext {
    public static final JvmRpcContext DEFAULT_CONTEXT = new JvmRpcContext();

    private final Map<String, ClusterNode> binds = new ConcurrentHashMap<>();

    public Optional<ClusterNode> resolve(final String bindName) {
        return Optional.ofNullable(binds.get(bindName));
    }

    public boolean bind(final String bindName, final ClusterNode node) {
        return binds.putIfAbsent(bindName, node) == null;
    }

    public boolean unbind(final String bindName) {
        return binds.remove(bindName) != null;
    }

    public static JvmRpcContext globalContext() {
        return DEFAULT_CONTEXT;
    }
}
